// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_BLINK_SCROLLBAR_IMPL_H_
#define CC_BLINK_SCROLLBAR_IMPL_H_

#include <memory>

#include "base/macros.h"
#include "cc/input/scrollbar.h"
#include "third_party/WebKit/public/platform/WebScrollbarThemePainter.h"

namespace blink {
class WebScrollbar;
class WebScrollbarThemeGeometry;
}

namespace cc_blink {

class ScrollbarImpl : public cc::Scrollbar {
public:
    ScrollbarImpl(std::unique_ptr<blink::WebScrollbar> scrollbar,
        blink::WebScrollbarThemePainter painter,
        std::unique_ptr<blink::WebScrollbarThemeGeometry> geometry);
    ~ScrollbarImpl() override;

    // cc::Scrollbar implementation.
    cc::ScrollbarOrientation Orientation() const override;
    bool IsLeftSideVerticalScrollbar() const override;
    bool HasThumb() const override;
    bool IsOverlay() const override;
    gfx::Point Location() const override;
    int ThumbThickness() const override;
    int ThumbLength() const override;
    gfx::Rect TrackRect() const override;
    float ThumbOpacity() const override;
    bool NeedsPaintPart(cc::ScrollbarPart part) const override;
    void PaintPart(SkCanvas* canvas,
        cc::ScrollbarPart part,
        const gfx::Rect& content_rect) override;

private:
    std::unique_ptr<blink::WebScrollbar> scrollbar_;
    blink::WebScrollbarThemePainter painter_;
    std::unique_ptr<blink::WebScrollbarThemeGeometry> geometry_;

    DISALLOW_COPY_AND_ASSIGN(ScrollbarImpl);
};

} // namespace cc_blink

#endif // CC_BLINK_SCROLLBAR_IMPL_H_
